Portion of a golf putter head



FIG. 1 is a top perspective view of a portion of a golf putter head showing my new design.

FIG. 2 is a top plan view thereof.

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a right side elevational view thereof; the other side being a mirror image thereof; and,

FIG. 5 is a further top perspective view thereof.

The broken line showing of various portions of the golf putter head and golf club is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a golf putter head, as shown and described. 